Descalers for Forgings (High-Pressure Descaling Systems for Forgings)

A descaler is engineered to remove the surface oxide (mill scale) that forms inevitably on steel during reheating in furnaces. It is an essential preparatory stage to guarantee workpiece cleanliness prior to forging.

The descaling process protects the integrity of forging dies and tooling. Without correct descaling, mill scale would be embedded into the workpiece, compromising the mechanical properties and surface finish of the final product.

The highest-performing descalers are those based on high-pressure hydromechanical technology (High-Pressure Water Descaling). Premium-grade systems, such as those engineered by HTS S.r.l., are distinguished by the use of manifolds with tungsten carbide nozzles and automation systems that synchronise the jet with workpiece passage. Superior quality is defined by the ability to remove 100% of the mill scale without significantly reducing the temperature of the forging core.

Selection must be based on three key criteria: the geometry of the workpieces (square billets, round billets or ingots), the required hourly throughput, and the material grade (alloyed or stainless steels require higher operating pressures). It is essential to evaluate nozzle configuration to guarantee 360° coverage, and to assess the presence of water filtration systems to minimise unplanned downtime.

A preliminary technical analysis is essential to correctly size pressure, flow rate and nozzle configuration.

The cost of a descaling system varies according to complexity and high-pressure pump capacity. As a general guideline, a customised industrial system ranges from €50,000 for compact units to over €200,000 for fully automated systems with water recirculation and Industry 4.0 integration. The investment is typically recovered within 12–18 months through savings on die replacement and reduced scrap rates.

Yes. As systems that fully meet the parameters of Industry 5.0 and the energy transition, the purchase of an HTS descaler may qualify for significant tax credits and grants for technological innovation. These systems improve resource efficiency and reduce environmental impact, fundamental requirements for current public funding programmes.

Absolutely. One of HTS S.r.l.’s core specialisations is retrofitting. Our descalers are designed to be integrated into pre-existing forging lines, positioned strategically between the reheating furnace and the press or hammer, following a detailed assessment of available footprint and existing material handling layout.

For most steel industry applications, the optimal pressure range is between 150 and 400 bar. Higher pressures are used for particularly challenging materials, such as stainless steels or titanium alloys, which develop a tightly adherent oxide layer requiring a more powerful kinetic impact for complete removal.

Although operation is automated, fundamental technical training is essential for routine maintenance management and nozzle calibration. HTS provides dedicated training sessions to instruct personnel on high-pressure plant safety and spray parameter optimisation.

In a high-pressure system, the most heavily loaded components are the spray nozzles, the high-pressure water valves and the pump seals. By using premium-grade materials such as forged stainless steels and anti-erosion inserts, HTS S.r.l. guarantees maintenance intervals significantly longer than market standards. In all cases, scheduled preventive maintenance is essential to sustain peak performance and prevent efficiency degradation.

An HTS S.r.l. descaling system is built for a service life of over 15–20 years, provided that scheduled preventive maintenance is carried out. The robustness of the stainless steel fabricated structure and the modularity of the electrical and hydraulic components allow for continuous technological upgrades over time.

Alloyed steels and stainless steels are the materials that derive the greatest benefit from an advanced hydromechanical system, as they tend to develop very hard oxide layers that require precise and powerful kinetic impact for complete removal.

Yes. By removing mill scale automatically and consistently, manual cleaning downtime is eliminated and the number of press strokes required for finishing is reduced. Furthermore, the decrease in workpieces scrapped due to oxide inclusions significantly increases the net throughput of the plant. It should be noted that productivity gains also depend on the degree of system integration and process optimisation.

Absolutely. Through the integration of IoT sensors and monitoring software, it is possible to measure in real time: the percentage of scale removal achieved, water consumption, constant nozzle pressure and workpiece surface quality. This data is translated into production KPIs that are immediately accessible for evaluating energy and operational efficiency.